Combination-lock



(ModeL) 2 Sheets-Sheet 1.

J. D. CRAIG. COMBINATION LOOK.

No. 408,795. Patented Aug-13, 1889.

J Fml.

Wiineases:

17117611107:- W 410 s Hi (Model 2 Sheets-Sheet 2.

J. D. CRAIG. COMBINATION LOOK.

No. 408,795. Patented Aug. 13-, 1889.

Wiinessesr Inventor-.-

UNITED STATES PATENT OFFICE.

JAMES D. CRAIG, OF ROGERS PARK, ILLINOIS, ASSIGNOR TO THE KEYLESS LOCK COMPANY, OF ILLINOIS.

COMBINATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 408,795, dated August 13, 1889.

Application filed September 26, 1887. Serial No- 250,690. (ModeL) To all whom it may concern.-

Be it known that I, JAMES D. ORAIG,a citizen of the United States, residing at Rogers Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Combination-Locks; and I do declare the following to be a full, clear, concise, and exact description of the invention, such as will enable others skilled in the art to IO which it appertains to make and use the same, reference being had to the accompanying drawings, and the letters of reference marked thereon,which form a part of this specification. My invention relates to that class of locks I 5 known as combination-locks.

The object of the invention is to enable a person to open the look, more especially in the dark, by feeling or touch in governing his procedure in operating its parts, instead of by sight or observation of the relative position of the parts previous to manipulation to unlock the same.

The invention consists in. the various coinbin ations of mechanism hereinafter described, and embodied in the claims.

In the accompanying drawings, Figure 1 is a view showing the base-plate of the lock,with its slotted hollow standard rigidly affixed thereto or made integral therewith, a spring 0 having one end riveted to the inside of the flange standing at right angles to the main part of the base-plate, and a pin projecting toward the standard. The said base-plate is placed so that its hollow standard projects 3 5 upwardly when assembling the parts. Fig. 2 is a view showing the lock-bolt. Fig. 3 is a view giving an illustration of a slotted camplate, which serves also as a spring-lever carrier, the spring-lever being represented as piv- 0 oted thereon, one end of the spring being fastened to the rigidly-fixed part forming the pivot or fulcrum of the lever, and the other or free end of the spring resting upon the end of the flange forming a catch or key at one end 5 of the said lever. Fig. 4 is a top or plan view showing an annular disk provided With a pin on one of its surfaces projecting upwardly and at right angles thereto. Fig 1 is considered as showing the base or bottom plate of ,o the lock; hence Fig. 4 is a top or plan View of the said annular disk, and other figures are named top or plan views for the same reason. This disk,with its pin, forms a part of the first tumbler. Fig. 5 is a top or plan view of the main part of the first tumbler, the disk and pin shown in Fig. 4 being the other part. Fig.

6 is a top or plan View showingawasher, there being two others of the same kind in the look,

as hereinafter fully described, and as shown in Fig. 20. Fig. 7 is a plan or top viewshow- 6o ing the second tumbler. Fig. 8 is a plan view of the third tumbler. Fig. 9 is a plan view of the index-plate or serrated and slotted disk. Fig. 10 is a bottom View of the driver. Fig.

11 is an inside or under view of the cap-plate, the same being provided with a flange on its inner surface extending in the are of a circle and also having three large flanges. Fig. 12

is a view showing the main binding-screw that passes up through the fixed standard for holding the knob on the driver. Fig. 13 is aview showing one of the three screws that are used to fasten together the top or cap plate and the base-plate after the parts of the lock have been properly assembled. Fig. 14 is a plan view showing an escutcheon to be placed on the side of a door in such aposition as to surround the base of the lock-operating knob. Fig. 15 is a view showing the under side of the knob. Fig. 16 is a side View of the driver shown in Fig. 10. Fig. 17 is a side view of the knob shown in Fig. 15. Fig. 18 is a plan view of the lock with the knob and top or cap plate removed, showing the position of the operating parts when the lock-bolt has been completely drawn back within the lock-case. Fig. 19 is a plan view of the lock, and is the same as that represented in Fig. 18, excepting that the lock-bolt has been thrown outward to its fullest extent. Fig. 20 is a view taken at right angles to that given in Fig. 18, showing the parts assembled, with the exception of the escutcheon and knob, the parts being relatively placed upon the slotted standard as they are intended to be arranged for operation, to wit: the bolt, (the forked end showing,) the cam-plate, (carrying its springlever,) the first tumbler, (made up of the parts shown in detail in Figs. 4 and 5,),the first washer (shown in detail in Fig. 6) placed on said first tumbler, the second tumbler, the second washer, (similar to the first washer,)

the third tumbler, the third washer, (also similar to the first and second washers,) the index-disk, and the driver.

Similar letters refer to similar parts throughout the several views.

A is the base-plate of the lock-case, the same having a flange at right angles to its main portion, in which flange is provided an opening a for the passage of the end of the belt that enters the lock-jamb.

a .is a spring securely riveted at one end to the flange of the base-platc A, its other end being bent at about a right angle to pass in the direction of the pivot of the springlcver and around the projection of said pivot, as shown in Fig. 1!), when the bolt is projected. The yielding end of said spring a is formed into a loop shape or bent part a a is a pin passing through the spring a, being rigidly secured to the flange of the base-plate. Holes a" for screw-bolts are provided, as shown.

B is the hollow standard rigidly aflixed. to the base-plate A or formed integrally therewith, having shouldered base portion Z), a smaller shouldered super-base portion b, and a cylindrical part IF, above the latter, provided with a slot If.

C is the lock-bolt, forked. to surround. the shouldered base portion 0 of the standard B. c is a pin on the bolt C.

c is the slot within the forked end of the bolt 0 and of a width nearly corresponding with the diameter of the base portion I), being slightly in excess, so as to admit the forked end of the bolt fitting around said portion 1) and yet be free to move thereupon in the bolts reciprocation.

c is the end of the bolt and of a size that will fit closely within the slot to and yet be capable of free reciprocatory movement therein.

1) is the cam-plate, having a circular aperture d to pass over the superbase portion 1) of the standard 1) and rest upon the upper part or shoulder of the base portion 1) and to be sufficiently free to be readily vibrated thereon.

d is a spring-lever, one end (Z of which is designed to come in contact at certain times with an inside part of the top or cap plate K, to be actuated thereby and cause its other end (I to be lifted, and by that movement c'arrya catch or key portion (1" out of engagement from within a slot in the index. plate or disk, and at the same time out of the slots registering at that particular time or juncture of the tumblers.

A spring (l having one end rigidly aflixed to the projecting end (1" of the pivot or fulcrum pin on which the lever (1 vibrates, has its other or free end bearing on the rear part of the key (1" (or it may bear on the lever itself near that part) to press the key it" inward toward the standard 13.

(I is a cam-groove in the eanrplate 1'), de-

signed to ailord bordering surfaces in the eamf are formed.

plate for actuating the hi or pin c, and thereby the bolt 0.

E is a top or plan view of an annular disk, the aperture c in its center beingdcsigned to allow it to fit upon the cylindrical part b of the standard 15 so as to turn thereon. Ithas a pin 0, projecting at right angles to its top surface and of a length slightly greater than the thickness of the annular disk F, and designed to pass through any one of the series of holes f provided therein, and extendingin the line of the are of a circle. This annular disk E is in a certain sense a washer serving in a measure in that capacity upon the camplate 1) and between it and the annular disk. F. In another sense it goes to form a portion of the first tumbler, serving principally as a means of carrying the pin c, and at the same time providing for its adjustalnlity, so that said pin c may be placed to operate in any one of the series of holes formed in the are of a circle in the annular disk F, for the purpose of diiii'crently setting the lock-combination as respects the first tumblers capability in that direction.

F is an annular disk, itbeing provided with a circular aperture j" at its center, like the parts E and l), and for a similar purpose.

f is a series of holes-fifteen in nun1berpassing through the annular disk F and extending in the line of an arc of a circle and at a distance from the aperture f corresponding with the distance the pin c of the annular disk E from the aperture 0 therein, and each of a size to freely admit said pin c.

f is a notch in the periphery of the annular disk F, extending about half-way to the line of the circle, in an arc of which the holes \V is a washer having a central circular aperture corresponding to that of the disks F and E, and of the same shape, excepting that at one side there is provided a tongue 2r, adapted to fit within the slot 1) of the standard B, the said washer being designed to be placed upon the first tumbler F E, and thus between it and the next or second tumbler G- to keep said tumblers somewhatapart, and yet allow the upper end of the pin c of the lower or first tumbler F E to engage in the arc-shaped slot in the second tumbler (l.

G is the Second tumbler, the same being an annular disk having a centralv circular aperture g, corresponding in size and shape with the aperturesfand c, and for a similar purpose.

g is a slot formed in the line of the are of a circle about midway between the central aperture g and the periphery of the disk,and of a size sufficient to allow the pin c to freely play or slide therein.

is a pin projecting at right angles to the upper face of the disk and in the line of the circle in the arc of which the slot 1 is form ed.

g" is a notch in the periphery of the disk for a similar purpose.

H is the third tumbler, the same being an annular disk, its circular center aperture h being of the same size as the apertures g and f and for a similar purpose. It is provided with two grooves each in the form of an arc of a circle, one 7L being longer than the other 7L2, each being located in a circle about halfway from the central aperture 7L and the periphery of the disk,being ata distance from the former corresponding with the distance the pin g of the tumbler G is from its central aperture Said tumbler G has two notches h and h in its periphery on opposite sides corresponding in size and shape to the notches g andf and for a similar purpose.

7L5 is a pin projecting from the top surface of the disk at right angles thereto, and of a size and length corresponding to that of the pin 9 and for a similar purpose.

I is an index plate or disk having a central aperture 2' like that of the tumblers, and for a similar purpose, having two slots 1" f, each in the form of an arc of a circle, and at a distance from the central aperture corresponding with that of the pin 71. from the central aperture h of the tumbler H. It also has a small aperture between the slots 4." and t and equally distant from the central aperture 1'. Its periphery is provided with two notches i and on opposite sides there- .of with serrations i extendin entirel around, with the exception of a plain are surface t J is the driver, havinga circular central aperture j corresponding in size with that of thetumblers, and for a similar purpose. It is provided with a pin j on its lower surface for entering the aperture of the index'plate I for aetuatin the latter. On its upper surface are two pinsj j, and in its periphery are two notches j" and The pins 3 7" are sufficiently long to pass through the central opening in the escut-cheon that is designed to be placed on the face of the door, and also into holes in the under surface of the knob, the base of which rests in the large aperture of the escuteheon.

j is a shoulder around the upper edge of the drii er.

K is the capplate, being provided with flanges on three of its sides, of a depth corresponding with the height of the upper surface of the flange of the driver, so that when the cap-plate is placed on the base-plate they will form a chamber. In the center of said cap-plate is a circular aperture 7; of sul'ficient size to snugly fit over the top of the driver J and rest upon its shoulder j. A flange projects from the inside surface, the inside face k of the flange being in the shape of the arc of a circle. I-loles k for screw-bolts are provided corresponding with the holes a in the base-plate A. r

N is the escutcheon, having a central aperture n of sufficient size to embrace the base of the knob O that operates the lock-bolt.

O is the lock-operating knob, it being provided with a screw-threaded hole 0 at its center, and two holes 0 0 at a distance from the center corresponding with the distance of the pins 3' j from the center of the driver J.

In assembling the various parts the baseplate A, Fig. 1,is placed with its slotted standard B projecting upwardly. Then the lockbolt 0, Fig. 2, is placed upon the base-plate with the base portion 1) of the standard B in the slot 0 of the bolt 0, and with the front end 0 of the bolt in the slot 0. Then the camplate D, Fig. 3, is placed in position on the slotted standard, the same resting upon the base I) and around the supeioase portion Z), and the yielding end of the spring a is bent back, and its loop part a is placed around the projection (Z of the pivot of the springlever cl, as shown in Fig. 19. The annular disk E, Fig. at, is then placed so that its circular aperture 6 passes over the standard 13 and surrounding the cylindrical part b and resting 011 the top of the superbase portion 1), the pin 6' of the disk E projecting upward. The annular disk F, Fig. 5, is next placed on the annular disk E, the cylindrical part b of the standard B passing up through the central aperture f and the pin 6 through any one of the apertures f. This disk F maybe placed on the standard 13 with either side up. The two disks E and F, as provided, go to form the first tumbler. Next, the washer WV, Fig. 6, is placed around the cylindrical part b of the standard B, with its tongue to passing into the slot 12 and its body resting on the disk F, (or the upper part of the first tumbler.) The washer is thus held by its tongue 10 from revolving around the standard by means of the friction of eitherof the adjacent tumblers, and prevents the surfaces of the tumblers m eetin g, whereby they would tend to move each other whenever one should be rotated. Next, the second tumbler G, Fig. 7, is placed with its pin upward on the washer \V,.the cylindrical part b of the standard B passing up through its aperture g, and the pin e of the first tumbler E F passing into the slot g. Then another. washer V, Fig. (i, is placed around the cylindrical part Z1 of the standard B and upon the second tumbler G, with the tongue w in the slot 11 Then the third tumbler H, Fig. 8, is placed with its pin 7L5 upward on the second washer around the cylindrical part as in the case of the other tumblers, and with the pin g passing into one of the slots h 7L2. A third washer is next placed on the third tumbler in the manner washers were placed on the first and second tumblers. Next, the index-plate I is placed on the third washer and around the cylindrical part Z2 after the manner the tumblers were placed, the pin 7L5 passing into either of the two slots 71 and The driver J is then placed upon the indexplate asthe tumblers were placed around the cylindrical part b and with the pin j pass- ICC ing into the aperture i of the index-plate I. The cap-plate K is thereupon placed in position over the assembled parts of the mechanism, the aperture 7c allowing its fitting snugly down upon the shoulder j" of the driver J. The threaded end of the screw L, Fig. 2, is then passed. up through the hollow standard 13 from. below the plate A, and the threaded ends of three screws M, Fig. 13, are passed up through the holes a" in the plate A, these latter screws being screwed into the screw threaded holes 7;. of the plate K, thus fastening together the two parts of the casing and inclosing the main operative parts of the lock mechanism. In this condition the lock may be operated by taking hold of the pins j' j of the driver J, to show the manner the parts thereof work together, but in setting it up for use on a door it is necessary to pro vide an escutcheon to surround the pinsj j and rest upon the face of the door, and to secure a knob O,1 ig. 17, upon the outer ends of the pins j j", the latter passing into holes o Fig. 15, in the under side of the knob O, and the said knob being securely held thereon by means of the screw L, Fig. 1;, the threaded end of the latter being scrcwedinto the threaded socket 0, Fig. 15, of the knob. The screw L works freely in the hollow standard B.

The positive movements imparted to the lock in looking and unlocking the same result from the use of the cam-plate D, provided with the cam-slot (l and the springlever and the catch or key connection with the index-plate I, which latter is at all times positively actuated by the driver J, the latter bein operated by the knob. \Vhen the bolt is unlocked, the cam-plate D and all its connections, including the driver and the knob U, are brought to a standstill, the cam-slot being limited in length just sufficient to serve in fully withdrawing the bolt, and the catch or key d being unyieldingly held in positive engagement in a radial slotin the index-plate by means of the circular surface 7r? of the flange Ir. of the top plate K,said circular sur- "face of the llange It being in such close proximity to the outer end of the key or catch (1" during the turn of the index-disk in unlockinthe bolt, as well in the back turn up to the completion of locking, or outwardly thrusting the bolt, as to prevent any possible disengagement. Just, however, at the moment of the complete locking of the bolt the said catcl1piece or key (1 is atoncelifted out of engagement with the radial slot in the index'plate, in which it was serving to receive movement and was imparting the same to its lever d, pivoted to the cam-plate, and there by moving the cam-plate. This entire disengagement of the driving parts and the driven parts, extending from. and including the key and lock-bolt, is necessary in order that the knob and its attached driver may be freely rotated in either direction without affecting the other movable or operative parts of the It will be observed that just as the outside part of the key in the unlocking movement reaches that end of the flange k opposite the center of the bolt said key is no longer positively held down inv the radial notch in the index-plate, but may be readily moved or tripped out therefrom,which soon occurs, but notuntil the rearend of the lever (Zstrikes the inside of the top casing at the point :13, justin the rear of the forked. end of the bolt. This sudden contact depresses that end of the lever, thus strikingthe case, and elevates the other end and its catch piece or key, throwing the latter entirely out of the radial' notch t or F in the index-plate, whereupon the index-plate, the driver, and knob are released and are entirely free to be rotated in either direction so long as a suitable combination (for allowing the key to again engage in one of the radial slots in the index-plate) is not arrived at. y

It will. be observed that the part F of the first tumbler E l has no fixed pin projectin g from its surface, and also that the indexplate I is likewise without a pin rigidly attached thereto and forming a part thereof. As resulting from this particular construction each of said parts F and I may be used with either of its sides up; hence they may be reversed to set new combinations, since the relative arrangement of the drivin pin and the driven pin in each. will thereby be changed. There being fifteen holes in the part F, that many diiferent combinations may be set by putting thepin c of part E in either one of said holes. If said part F be reversed, then as many more combinations may be availed of in like manner. Then if the indexplatel. be reversed, its slots zi and i being thereby differently arranged with respect to the driving-pin engaging in the aperture 1 each of the possible precedinglyprovided combinations may thereby be changed to other and different combinations.

The serrations "11 in the peripheral portion of the in dex disk or plateI are intended to be of sufficient depth only for indicating to a person turning the knob, through the sense of touch or feeling, the position of the smooth. part 17, that forms a curved surface or are of the periphery with relation to the catch. or key 1 so that in turning the knob he may keep count of the slight tremors, vibrations, or clicks of the key as it passes from the smooth are into a scrration, and of the number of serrations in passing from one to another; henee, having in mind the combination on which the lock is set, he is able to bring the tumbler-key into register with the proper slots in the tumblers and indexalisk to cause the latter to positively move the key, the spring-lever by which. it is carried, and the cam-plate to withdraw an d thereby unlock the bolt. Simply reversing the direction of IIO rotation of the knob locks the bolt and also releases the index-plate and tumblers from engagem ent with the key or catch-piece,where upon the knob, the indeX-plate, and the tumblers may be rotated freely in either direction until they are moved and again brought into the proper relationindicated by the com bination set for unlocking the bolt. In some instances it may be thought desirable to note the relation of parts and their approximations to the known combination by the sense of hearin g. This may be done, but the sense of touch is preferred as being more convenient and advantageous. The serrations 11 in the index-plate should not be so deep as to allow the key (1* to rest upon the tumblers, as this would tend to move or disturb them when such movement was not intended or desirable, and hence would interfere with attaining that relation of the parts to each other essential for unlocking the bolt.

-In the third tumbler there are two slots h 71. in either of which the pin g of the second tumbler G maybe placed in setting combinations, each of said slots providing for a different combination. It is not designed to limit the number or arrangement of the holes, as f, in the first tumbler, or the number or relative arrangement of the arc-formed slots in the other tumblers, as long as they are arranged 011 the plan heretofore described, whereby they are in proper relation to the pins designed for operation therein.

In setting a combination it is necessary to remove the knob, the cap-plate, and the driver. Then the parts may be removed in the reverse order of assembling them down to the camplate, when anyone of the fifteen holes of the first tumbler E F may be made use of for receiving the pin 6, each representing a different combination, and,when desired, the annular disk F may be reversed and thesaid holes used for setting the lock on as many more different combinations. The manner of assembling the parts and of making use of the various combinations attainable, as indicated above, will be readily understood by any one skilled in the art.

The spring a serves to bring back the camplate, after it has been rotated to unlock the bolt, to a certain position on which the combination is formed. Catching,as it does, by the loop in its free end over the projection formed by the extension of the pivot on which the spring-lever vibrates, it yields until the lever is tripped and then pulls the cam-plate around to the desired position for forming the combination.

The slots in the peripheries of the tumblers areof a size freely admitting and. providing for the noiseless travel of the pins that operate thercin. By reason of this construction the position of the slots in the tumblers cannot be learned by any one endeavoring to pick the lock or tamper therewith, as may be the case in the commonly-used combinationlocks. In other words, this construction preto rotate it.

vent-s the combination from being discovered, as may be in ordinary combinations, by feeling the position of the slots in the peripheries of the tumblers through the pressure of the tumbler key or catch as it passes over them. The driver may be dispensed with and the knob be connected directly to the index-plate in any suitable way, or other forms of drivers may be used instead of the one shown and described, as it may be of any form that will simply connect with the index-plate and serve In the form shown the side notches 9' 7' afford room for the tumbler-key to play, and the pin j makes positive connection with the index-plate; but other provision will answer.

The index-plate and the tumblers may be variously shaped, they retaining, however, the features of construction in their peripheries essential for engagement by the catch-piece or key of the spring-pressed lever, and the cam-plate may also be somewhat modified in form but still maintain its character as a camplate.

The pin a passes loosely through the hole in the spring a, so as not to interfere with its movements. Said pin serves to limit the movement in one direction of the cam-plate, it resisting the front face part of the key until such time as said key enters the registering-notches of the index-plate and the tumblers. hen, however, the flange It is formed on the under side of the top plate K, then the pin a may be dispensed with, as the end of this flange is in such position as to be engaged by the front face of the key (1 until said key falls into the radial notches of the index-plate and tumblers, when they are all brought into register, and the curved inner wall of the said flange then serves to positively hold the said key in the said notches during theunlocking and locking operations as the cam-plate performs its partial revolution. Thus it will be apparent that the said pin a or the end wall of the said flange, when either is employed, serves as a stop to hold the cam-plate from rotating in one direction until the key falls into the notches of the tumblers and indexplate, when they are all broughtinto register, while the bent end a of the spring a limits the movement of the said cam-plate in the opposite direction when the bolt is thrown outward and the locking operation is completed. NVhen the bolt is fully withdrawn in unlocking, the pin 0 on the bolt comes in contact with the end of the .slot d of the cam-plate D, the wall at the end of said slot serving as a stop to limit the unlocking movement of the said cam-plate.

I-Iavin g fully described my invention, what I desire to claim and secure by Letters Patent 1s 1. In a combination-lock, the combination, with a suitable casing, a bolt having a pin, and notched tumblers, of an index-plate having a serrated periphery, excepting at one part, which is plain or smooth, said index- ITO plate having at its periphery one or more notches, a cam-plate having a cam-slot which receives the said pin on the bolt, and a springpressed lever pivoted to said cam-plate and having a catch-piece or key to bear upon the periphery of the said index-plate and to enter the notches of the said tumblers and index-plate when they are all brought into register, and serving to move the said cam-plate and bolt when the said driver, index-plate, and tumblers are turned, substantially as and for the purpose set forth.

2. In a combination-lock, the combination, with a suitable casing, a belt, a cam-plate, a spring-pressed lever pivoted to the latter and provided with a catch-piece or key, and an index-plate having serrated and smooth portions at its periphery, of a series of notched tumblers connected together and one of which consists of two disks,one of said disks having a pin, and the other of said disks be ing changeable and reversible and having a series of holes into any one of which the said pin may be entered from either side of the changeable and reversible disk, substantially as and for the purpose set forth.

3. In a combination-lock, the combinathm, with a suitable casing, a bolt, a cam-plate, a spring-pressed lever pivoted to the latter and thus movable therewith and provided with a catch-piece or key, and a series of connected notched tumblers, of a reversible index-plate having serrated and plain surfaces and notches at its periphery, and having also two or more slots into either of which a pin on the adjacent tumbler may enter and between said slots an aperture, and a driver having a pin to enter the said aperture, substantially as and for the purpose set forth.

-,1-. In a combination-lock, the combination, with an index plate and tumblers each having a radial notch and all arranged together for rotary movement on a common support, of a bolt, a cam-plate arranged to rotate on said support, a spring-pressed lever pivoted to said cam-plate and provided with a key or catchpiece, a cap-plate having a curved flange on its under surface to positively hold the said key or catch-piece in engagement with the notches of the index-plate and tumblers during the locking and unlocking movements, and a spring arranged to serve as a stop for the said cam-plate in one direction, substantially as set forth.

5. In a combinaiion-lock, the combination, with an index-plate and tumblers each having a radial notch and all arranged together for rotary movement on a common support, of a belt, a cam-plate arranged to rotate on said support, a spring-pressed lever pivoted to said cam-plate and provided with a key or catch-piece, a cap-plate having a curved flange on its under side to positively hold the said key or catch-piece in engagement with the notches of the index'plate and tumblers during the locking and unlocking movcments a spring arranged to serve as a stop for the said cam-plate in one direction and a stop to limit the movement of the said cam-plate in the opposite direction, substantially as set forth.

0'. In a combinationdock, the combination, with the bolt, the connected notched rotary tumblers and index-plate, and the driver to turn the said tumblers and plate, of the rotary canrplate, the spring-pressed lever piv oted thereto and provided with akey orcatchpiece to enter the notches of the said indexplate and tumblers, and a stop to be engaged by the said key or catch-piece when it is lifted from the notches oi the tumblers and indexplate and thereby limit the turning move ment of the cam-plate in, one direction when the tumblers and in dex-pl ate are to be rotated, and a stop-as part a of spring (t-to limit the movement of the said cam-plate in the opposite direction, substantially as set forth.

7. In a combination-lock, the combination, with the base-plate A, having the hollow standard or tumbler-support 13, of the bolt (1, having the pin (1, the cam-plate l),having the cam-slotd to receive the said pin, the springpressed lever (7 having the key or catchpiece (1, a series of notched rotary tumblers on said standard or support, a rotary indexplate I, connected with said tumblers and having a periphery with serrated and smooth portions and one or more radial notches, a driver J, connected with said index-plate, and a cap-plate K, having an internal curved flange is, substantially as set forth.

8. In a combination-lock, the coinlnnation, with a bolt, aserrated and notched index plate, and notched tumblers, of a Citlll.] )]2ll.0 to operate said bolt, a spring-pressed lever pivoted to said cam-plate and provided with a catch-piece or key to enter the peripheral notches of the said index-plate and tumblers and thus comm unieate the movements thereof to the cam-plate and bolt, substantially as set forth.

JAMES l). CRAIG.

Witnesses:

.IuNNIu A. lonrlcn, (luas. H. SPARKS.

ICC 

